EP3701745A1 - Procédé et appareil pour prendre en charge la mobilité d'un terminal dans un système de communications sans fil - Google Patents

Procédé et appareil pour prendre en charge la mobilité d'un terminal dans un système de communications sans fil

Info

Publication number
EP3701745A1
EP3701745A1 EP19789136.9A EP19789136A EP3701745A1 EP 3701745 A1 EP3701745 A1 EP 3701745A1 EP 19789136 A EP19789136 A EP 19789136A EP 3701745 A1 EP3701745 A1 EP 3701745A1
Authority
EP
European Patent Office
Prior art keywords
base station
related information
terminal
terminals
path
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19789136.9A
Other languages
German (de)
English (en)
Other versions
EP3701745A4 (fr
Inventor
Namryul JEON
Seungil Oh
Daejoong Kim
Seungbo YOO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of EP3701745A1 publication Critical patent/EP3701745A1/fr
Publication of EP3701745A4 publication Critical patent/EP3701745A4/fr
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0636—Feedback format
    • H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/085—Reselecting an access point involving beams of access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/324—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by mobility data, e.g. speed data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/06—Reselecting a communication resource in the serving access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/304—Reselection being triggered by specific parameters by measured or perceived connection quality data due to measured or perceived resources with higher communication quality

Definitions

  • the disclosure relates to 5th generation (5G) wireless communication (or next generation wireless communication). More particularly, the disclosure relates to a method and an apparatus for supporting mobility of a terminal in a wireless communication system.
  • 5G 5th generation
  • next generation wireless communication More particularly, the disclosure relates to a method and an apparatus for supporting mobility of a terminal in a wireless communication system.
  • the 5G or pre-5G communication system is also called a “beyond 4G network” communication system or a “post long-term evolution (LTE) system.”
  • 5G communication systems development for system network improvement is under way based on evolved small cells, advanced small cells, cloud radio access networks (RANs), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, moving network, cooperative communication, coordinated multi-points (CoMP), reception-end interference cancellation, and the like.
  • RANs cloud radio access networks
  • D2D device-to-device
  • CoMP coordinated multi-points
  • FSK frequency shift keying
  • QAM quadrature amplitude modulation
  • SWSC sliding window superposition coding
  • ACM advanced coding modulation
  • FBMC filter bank multi carrier
  • NOMA non-orthogonal multiple access
  • SCMA sparse code multiple access
  • the Internet which is a human centered connectivity network where humans generate and consume information
  • IoT internet of things
  • IoE internet of everything
  • Technology elements such as “sensing technology,” “wired/wireless communication and network infrastructure,” “service interface technology,” and “security technology,” have been demanded for IoT implementation; therefore, recently there has been research on a sensor network, machine-to-machine (M2M) communication, machine type communication (MTC), and so forth.
  • M2M machine-to-machine
  • MTC machine type communication
  • IoT Internet technology services
  • IoT may be applied to a variety of fields including smart home, smart building, smart city, smart car or connected car, smart grid, health care, smart appliances, and advanced medical services through convergence and combination between existing information technology (IT) and various industrial applications.
  • IT information technology
  • 5G communication systems to IoT networks.
  • technologies such as a sensor network, M2M communication, and MTC may be implemented by beamforming, MIMO, and array antennas, which correspond to 5G communication technologies.
  • Application of a cloud RAN as the above-described big data processing technology may also be considered to be an example of convergence between the 5G technology and the IoT technology.
  • One of main technologies of the 5G communication system as described above is to use an ultra-high frequency (mmWave) the wavelength of which is greatly shorter than the wavelength of the existing radio frequency in order to implement faster communication with a large bandwidth.
  • the high frequency band has very low permeability and diffraction, and thus a communication system using the ultra-high frequency should be operated based on the beamforming to heighten the transmission/reception rate and to widen the coverage area.
  • the 5G communication system is planned to implement the maximum download speed of 20 Gbps and a response speed of 1 ms or less.
  • the 5G communication system aims at the above-described implementation even in an environment of connection of more than 1,000,000 devices and high velocity of 500 km per hour.
  • the 5G communication system is planned to use an extended bandwidth as compared with that of the LTE through the use of ultra-high frequency band of 28 GHz that has not yet been used as the existing mobile communication frequency.
  • the high frequency band causes a small service coverage area and low permeability and diffraction, beamforming schemes are used to gather signals to one spot and to provide the gathered signals to a terminal.
  • a mobility function of a terminal is performed by beam change and handover.
  • Such beam-based communication secures the mobility of a terminal in a beam-to-beam manner in which the communication drifts from one beam to another.
  • transmission/reception lines should always be aligned, and if such an alignment is distorted in the beam change process, the electric field may be abruptly deteriorated.
  • handover is triggered after an event occurs, in which the signal strength of the beam of a target cell becomes higher than the signal strength of the beam of a serving cell.
  • serving beams of terminals located in the moving high-speed train and transmission/reception alignments among terminals may be distorted to abruptly deteriorate the electric field, and this may cause handover failure, performance deterioration, and dropped calls to occur.
  • an aspect of the disclosure is to provide a method and an apparatus for supporting mobility of a terminal in a wireless communication system.
  • a method by a base station includes generating beam-related information for a plurality of terminals from a beam measurement result received from the plurality of terminals, detecting a path in a coverage area of the base station using the beam-related information, and transmitting a message for supporting mobility based on the beam-related information to the terminal determined to move along the path.
  • detecting the path may further include identifying similarity between the beam-related information for two of the plurality of terminals by comparing the beam-related information for the two terminals with each other, and determining that a route in which the two terminals move forms the path if the similarity satisfies a specific condition.
  • identifying the similarity may include comparing beam identifier (ID) numbers, beam ID values, and beam ID orders included in the beam-related information for the two terminals with each other, and comparing ratios of staying time with respect to the beam IDs included in the beam-related information for the two terminals with each other.
  • ID beam identifier
  • the beam-related information may include information on at least one of a reason why a specific terminal configures a connection with the base station, a reason why the specific terminal releases the connection with the base station, IDs of serving beams experienced by the specific terminal while moving in the coverage area of the base station, staying time for which the specific terminal stays in the respective serving beams experienced by the specific terminal while moving in the coverage area of the base station, a handover out result, or a handover out target, wherein the information included in the beam-related information is stored as profiles of the plurality of terminals.
  • the method may further include determining whether a specific terminal moves along the detected path, wherein determining is performed through comparison to determine whether the beam measurement result reported by the specific terminal is similar to at least a part of the path.
  • the method may further include determining a serving beam ID allocated to the specific terminal, a serving beam order, and a serving beam allocation time based on the beam-related information corresponding to the detected path if it is determined that the specific terminal moves along the detected path.
  • the method may further include changing the serving beam of the specific terminal in accordance with the determined serving beam ID, serving beam order and serving beam allocation time if it is determined that the specific terminal moves along the detected path.
  • the message for supporting the mobility may include a handover command message indicating a handover to a target cell, wherein the handover command message includes information on the target cell and the first serving beam determined based on the beam-related information.
  • the information on the target cell and the first serving beam included in the handover command message may be generated based on the beam-related information on which the handover to the target cell has succeeded among the beam-related information for the plurality of terminals.
  • the handover command message may be transmitted to the terminal at a time determined based on the beam-related information on which the handover to the target cell has succeeded.
  • a base station in accordance with another aspect of the disclosure, includes a transceiver configured to transmit and receive a signal, and a controller configured to generate beam-related information for a plurality of terminals from a beam measurement result received from the plurality of terminals, detect a path in a coverage area of the base station using the beam-related information, and transmit a message for supporting mobility based on the beam-related information to the terminal determined to move along the path.
  • the base station can collect movement patterns and histories of the terminals and support mobility of the terminal based on this, a procedure related to the mobility of the terminal can be simplified.
  • the terminal movement time, the target cell that is the object of movement, and the target beam can be obtained in advance, it is possible to prevent the electric field of the serving beam for the terminal from being abruptly dropped. Accordingly, stability of the communication connection between the terminal and the base station can be secured, and the user sensory communication performance can also be improved.
  • FIG. 1 is a diagram explaining a beam-based communication system according to an embodiment of the disclosure
  • FIG. 2 is a diagram explaining a handover procedure in a 5th generation (5G) communication system according to an embodiment of the disclosure
  • FIG. 3 is a diagram explaining a communication environment according to an embodiment of the disclosure.
  • FIG. 4 is a flowchart illustrating an operation method by a base station according to an embodiment of the disclosure
  • FIG. 5 is a diagram explaining a path detection process according to an embodiment of the disclosure.
  • FIG. 6 is a diagram explaining a path derivation process according to an embodiment of the disclosure.
  • FIG. 7 is a flowchart illustrating a terminal path determination process according to an embodiment of the disclosure.
  • FIG. 8 is a flowchart illustrating a terminal mobility support process according to an embodiment of the disclosure.
  • FIG. 9 is a diagram illustrating the structure of a terminal according to an embodiment of the disclosure.
  • FIG. 10 is a diagram illustrating the structure of a base station according to an embodiment of the disclosure.
  • These computer program instructions may also be stored in a non-transitory computer-usable or computer-readable memory that can direct a computer or another programmable data processing apparatus to function in a particular manner, such that the instructions stored in the non-transitory computer-usable or computer-readable memory produce an article of manufacture including instruction means that implement the function specified in the flowchart block or blocks.
  • the computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operations to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions that execute on the computer or other programmable apparatus provide operations for implementing the functions specified in the flowchart block or blocks.
  • each block of the flowchart illustrations may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the blocks may occur out of the order. For example, two blocks shown in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved.
  • ⁇ unit means, but is not limited to, a software or hardware component, such as field-programmable gate array (FPGA) or application-specific integrated circuit (ASIC), which performs certain tasks.
  • FPGA field-programmable gate array
  • ASIC application-specific integrated circuit
  • ⁇ unit does not mean to be limited to software or hardware.
  • the term “ ⁇ unit” may advantageously be configured to reside on the addressable storage medium and configured to execute on one or more processors.
  • “ ⁇ unit” may include, by way of example, components, such as software components, object-oriented software components, class components and task components, processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables.
  • components and “ ⁇ units” may be combined into fewer components and “ ⁇ units” or further separated into additional components and “ ⁇ units.” Further, the components and “ ⁇ units” may be implemented to operate one or more central processing units (CPUs) in a device or a security multimedia card.
  • CPUs central processing units
  • FIG. 1 is a diagram explaining a beam-based communication system according to an embodiment of the disclosure.
  • a base station 120 of a beam-based communication system 100 operates a plurality of different beams in its coverage area.
  • the plurality of beams formed by the base station 120 to transmit a signal may be discriminated by beam identifiers (IDs) allocated to the respective beams, and FIG. 1 exemplarily illustrates 18 beams that are a half of 36 beams operated by the base station 120.
  • IDs beam identifiers
  • a terminal 110 located in the coverage area of the base station 120 measures the beam power periodically or aperiodically, and reports the measured beam power to the base station 120. That is, the terminal 110 selects the best beam having the best beam reference signal received power among the transmitted beams of the base station 120 to report the selected best beam to the base station 120, and the base station 120 selects a serving beam of the terminal 110 based on the result reported by the terminal 110 and performs communication with the terminal 110.
  • the base station 120 can obtain a specific location and staying time of the terminal 110 in the coverage area in a further subdivided unit than a cell unit. Further, because the mobility function of the terminal 110 is supported through beam change and handover, the mobility of the terminal can be guaranteed in a beam-to-beam manner.
  • FIG. 2 is a diagram explaining a handover procedure in a 5th generation (5G) communication system according to an embodiment of the disclosure.
  • a case is illustrated where a function split scheme is applied, in which partial layer functions of a base station are implemented in different entities.
  • entities illustrated as a source cell access unit (AU) and a target cell AU in the handover procedure 200 of FIG. 2 functions of physical (PHY), media access control (MAC), and partial radio link control (RLC) layers among layer functions of the base station in the related art can be implemented, whereas in a base station entity illustrated as vNB, functions of the remaining RLC, packet data convergence protocol (PDCP), and radio resource control (RRC) layers can be implemented.
  • PHY physical
  • MAC media access control
  • RLC radio link control
  • vNB functions of the remaining RLC, packet data convergence protocol (PDCP), and radio resource control (RRC) layers can be implemented.
  • PDCP packet data convergence protocol
  • RRC radio resource control
  • both the entity (AU) including the partial functions including the PHY and the entity (vNB) including the partial functions including the RRC can be called "base stations.”
  • the 5G communication system also maintains the handover function to support mobility of a terminal, which may also be referred to as a user equipment (UE).
  • a terminal which may also be referred to as a user equipment (UE).
  • UE user equipment
  • two kinds of handover can be defined: First is a network-controlled handover that is similar to the handover in the related art, and second is a UE-based handover provided against an abrupt loss of the electric field.
  • FIG. 2 exemplarily illustrates a general network-controlled handover procedure.
  • respective AUs transmit beam reference signals (BRSs) for beam measurement to the terminal at operation 205, and the terminal measures received powers of the BRS received from neighboring base stations at operation 210, and reports the measurement result (5G cell measurement report in FIG. 2) to the base station (vNB)at operation 215.
  • the terminal can report, to the base station, the beam ID of the best beam, i.e., the beam having the best beam received power measured.
  • the base station having received a report of the measurement result from the terminal determines a handover of the terminal at operation 220. Then, the base station configures a resource for the target cell AU to support the terminal and establishes a general packet radio service (GPRS) tunneling protocol (GTP) tunnel at operation 225 in association with network entities of a next generation core (NGC) network.
  • GPRS general packet radio service
  • GTP tunneling protocol
  • the base station commands the terminal to perform a handover by transmitting an RRC connection reconfiguration message including a "MobilityControlInfo" parameter to the terminal at operation 230, and the terminal having received this transmits a random access preamble to the AU of the target cell at operation 235, and receives a random access response at operation 240 to access the target cell.
  • the terminal having accessed the target cell transmits an RRC connection reconfiguration complete message to the base station (vNB) at operation 245, and then performs a PDCP status report procedure with respect to a downlink and an uplink at operations 250 and 255. If the handover procedure is completed, the radio resource for the source cell AU is released, and the previous GTP tunnel is also released at operation 260.
  • the handover procedure can be performed to support the mobility of the terminal.
  • FIG. 3 is a diagram explaining a communication environment 300 according to an embodiment of the disclosure.
  • FIG. 3 a diagram explains another example of a beamforming-based communication environment as described above with reference to FIG. 1.
  • a base station 310 communicates with a terminal using a plurality of different beams.
  • the base station in order to determine a serving beam for the terminal, the base station periodically or aperiodically receives a report of the beam measurement result from the terminal, and in an environment where the terminal moves at a high speed, reliability of the beam measurement result may not be sufficiently secured.
  • the best beam may have already been changed while performing a beam measurement and reporting the result of the beam measurement. In this case, it may be an inaccurate and inefficient process to select the serving beam in accordance with the report of the terminal, and it is necessary to improve such a process.
  • FIG. 3 illustrates a case where the terminal moves along a predetermined path in a coverage area of the base station 310. That is, in FIG. 3, a terminal of a user traveling on a high-speed train moves along a path 320 while the high-speed train travels along a railroad, and a terminal of a vehicle or a passenger's terminal moves along a path 330 while the vehicle travels on a highway.
  • the mobility of the terminal is relatively constant. That is, because a plurality of terminals moving along the path 320 that is a railroad and the path 330 that is a highway move in the same direction or in very similar directions, beam changes of the base station 310, which are experienced by the respective terminals, are completely the same as or extremely similar to one another.
  • the terminals moving along the path 320 experience the beam changes in the order of beam IDs of 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, and 4, and the terminals moving along the path 330 experience the beam changes in the order of beam IDs of 9, 8, 7, 6, 5, 4, 3, 2, and 1. If the terminals moving along such fixed paths move at substantially constant speed in the coverage area of the base station 310, the ratio of times for the plurality of beams to the whole time that the terminals experience in the coverage area may also be similar to one another.
  • FIG. 4 is a flowchart illustrating an operation method by a base station according to an embodiment of the disclosure.
  • a base station collects a beam history from a plurality of terminals located in the coverage area of the base station itself at operation 410.
  • Collection of the beam history means that the base station receives, stores, and manages the beam measurement results that are periodically or aperiodically reported by the plurality of terminals.
  • a terminal moving along a path will report a change of the best beam experienced by the terminal to the base station, and the base station may store acquired beam-related history information if the beam measurement result is reported from the terminal.
  • the beam history information may include one or more of beam-related information, such as a beam ID of the best beam reported by the terminal, the total time for which the terminal experiences the best beam, and the reception strength of the best beam experienced by the terminal.
  • the base station detects paths in the coverage area of the base station at operation 420. Detection of the paths may mean detection of routes on which terminals located in the coverage area of the base station tend to move.
  • the base station may detect the paths in which the terminals in the coverage area move relatively fixedly by comparing and analyzing beam histories collected from the plurality of terminals. Referring to FIG. 3 as an example, the base station 310 can detect a first path 320 and a second path 330 located in the coverage area.
  • One or more paths may exist in the coverage area of the base station, and a detailed process in which the base station detects the paths will be described with reference to FIGS. 5 and 6.
  • the base station determines whether the terminal moving in the coverage area of the base station move along the paths at operation 430. That is, the base station determines whether the terminals connected to the base station to receive services and move in the paths previously detected at operation 420, and such a determination process may be performed based on beam-related information that the terminals report to the base station.
  • the base station can determine whether the terminals, having reported the beam-related information, move in one or more paths detected at operation 420 by comparing the beam-related information reported by the terminals with the beam history possessed by the base station itself. Such a determination process will be described in detail with reference to FIG. 7.
  • the base station having determined that the terminals have moved in the paths, performs a procedure for optimizing handover of the corresponding terminals at operation 440.
  • the base station can identify a target cell of the terminals out of the coverage area of the base station through the handover connect to, and can identify what serving beam is allocated to the terminals while connecting to the corresponding target cell. Accordingly, if the terminal that is identified as moving in the path at operation 430 continues movement along the path, the base station can predict or estimate what serving beam of what target cell the terminal will connect to.
  • the base station can include such information in a message (e.g., a handover-related message or a handover command message) transmitted to the terminal to support the mobility of the terminal, and thus unnecessary signaling overhead or delay that would otherwise be required for the terminal to connect to the target cell can be reduced.
  • a message e.g., a handover-related message or a handover command message
  • FIG. 5 is a diagram explaining a path detection process according to an embodiment of the disclosure.
  • a table 500 exemplifies a method by a base station, which has collected beam-related information reported by a terminal, for storing and managing a beam history.
  • the configuration of the beam history illustrated in FIG. 5 is merely exemplary, and the base station may further add and manage other parameters from the beam-related information reported by the terminal, or may store and manage the beam history except for parts of the contents illustrated in FIG. 5.
  • the beam history information may include a specific beam ID, a staying time (i.e., a duration) in an area corresponding to the corresponding beam ID, a performance index, and other information.
  • the beam history information may be managed by terminals through accumulation and storing of the beam-related information reported by the terminal through beam measurement.
  • the beam-related information may be stored and managed in the form of a beam-related profile for each terminal.
  • the terminal reports the beam-related information to the base station just after configuring a connection with the base station, and such a connection may occur due to various causes, such as call setup, handover-in (i.e., a received handover), and RRC connection reestablishment.
  • the base station can manage such connection configuration causes as a "Start Cause" item.
  • the terminal reports the beam-related information periodically or aperiodically until the connection with the base station is released, and the base station can manage various connection release causes, such as call release and handover-out (i.e., a handover to a target cell), as an "End Cause" item.
  • the terminal While the connection is maintained, the terminal periodically or aperiodically reports the beam-related information to the base station, and the beam-related information may be the beam ID of a beam measured by the terminal with a best reception strength. If the terminal successively reports the best beams, the base station can store the beam IDs reported by the terminal in association with the staying times in the corresponding beam. If the same beam ID is continuously reported, it means that the staying time in the corresponding beam area is relatively long. Further, the base station may also manage the beam-related information based on the received signal strength reported by the terminal in the corresponding beam area in association with the performance index.
  • the terminal can determine that the staying time for which the terminal stays in an area corresponding to a specific beam is the time for which the same beam ID is continuously received.
  • Table 1 An example is shown in Table 1 below.
  • the base station can track how long each terminal stays in an area corresponding to what beam in the coverage area of the base station itself, and it can store and manage the same in the form of the table (or profile for the terminal) illustrated in FIG. 5.
  • the terminal may release the connection for various causes in the coverage area of the base station, and in this case, the terminal may perform a handover to another base station due to the mobility of the terminal.
  • the base station stores the result of the handover-out in the beam history to manage the result of the handover-out. If the handover-out has succeeded, the base station may store and manage the ID of a target cell to which the terminal connects through the handover together with the beam ID of the target cell allocated to the terminal when the terminal first connects to the target cell.
  • the base station determines whether the terminals in the coverage area of the base station move along the paths based on the beam history information as described above with reference to FIG. 5, and hereinafter, with reference to FIGS. 6 and 7, this will be described in detail.
  • the base station derives paths existing in the coverage area before determining whether the terminals move in the paths.
  • FIG. 6 is a diagram explaining a path derivation process according to an embodiment of the disclosure.
  • the base station 610 continuously receives reports of beam-related information from the plurality of terminals moving along a path 620.
  • the terminals moving along the path 620 move on a fixed route (e.g., a road) that is the path 620, the orders of beams experienced by the terminals are extremely similar to one another.
  • the terminals moving along the path 620 have an extremely high probability that they report the best beams in the order of beams 9, 8, 7, ..., and 1.
  • the base station configures and stores the beam-related information (i.e., beam profile) reported by the terminals moving along the path 620 as the beam histories 630, and if the beam histories have high similarity, the base station can recognize the corresponding beam history as a specific path.
  • the beam-related information i.e., beam profile
  • FIG. 7 is a flowchart illustrating a terminal path determination process according to an embodiment of the disclosure.
  • the process 700 in which the base station recognizes the paths may start through clustering of beam history information at operation 710.
  • the clustering process may be performed, for example, whenever the number of gathered beam histories (i.e., profiles) that the base station collects from terminals in a cell becomes equal to or larger than a predetermined number, or the clustering process may be performed at specific time intervals, or the clustering process may be aperiodically performed in accordance with an input of an enterpriser or a manager.
  • the base station considers that a candidate pair having the total staying time of 5*T s or less has low reliability in a list of candidate pairs each of which is composed of a "beam ID" and a "staying time,” and excludes the low reliability candidate pair from the candidate pair list.
  • the base station may exclude the corresponding history from the path derivation process. Such a threshold number of reports may be adjusted to another value.
  • the beam history candidate pair that is a target of clustering can correspond to only the beam history candidate pair in the case where a connection to a target cell through a handover in the coverage area of the base station has succeeded. This is because only information of the terminal that has handover-out from the coverage area through the handover success can be used for other terminals.
  • the base station performs a clustering process with respect to the candidate pairs having secured reliability, and determines similarity between the candidate pairs at operation 720.
  • the similarity determination process is performed through selection of two of a plurality of beam history candidate pairs, and it is performed with respect to the number of all cases where two of all beam history candidate pairs having the secured reliability are selected.
  • the base station first compares the numbers of IDs of beams included in the two beam history candidate pairs U i,1 and U i,2 with each other. If the numbers of IDs of beams included in the two beam history candidate pairs are not equal to each other, there is a high possibility that two terminals move along different paths.
  • the base station determines whether values and orders of beam IDs ⁇ b i,1 ⁇ and ⁇ b i,2 ⁇ included in the two candidate pairs are equal to each other. This process can be expressed as in Equation 1 below.
  • the base station determines similarity by comparing beam IDs included in the two beam history candidate pairs and corresponding staying times with each other. Such a process can be performed in accordance with Equation 2 below.
  • the reason why (i.e., cause) the staying time is divided into T 1 and T 2 is to derive an accurate result through comparison of the ratios of the times experienced by the two terminals to the total time in the case where the terminals move at different speeds.
  • the term "i" corresponds to the number of all beam IDs included in the beam history candidate pair, and the numbers of beams experienced by the two terminals are equal to each other, the term “i” will be equally applied to the two terminals.
  • the left side of the Equation 2 corresponds to the resultant value obtained by comparing differences between the staying times with each other for the two terminals, and if the resultant value on the left side of the Equation 2 is smaller than on the right side, it can be considered that the staying times experienced by the two terminals are similar to each other.
  • the value of is a certain adjustable value, and as the value is configured to be low, the similarity between the terminals can be determined.
  • the base station can determine that the terminals corresponding to two candidate pairs that are the targets of comparison have passed through the same path in the coverage area, and the path can be derived through definition thereof in Equation 3 below at operation 730.
  • the handover command message may be transmitted to the terminal at a time determined based on the beam-related information on which the handover to the target cell has succeeded.
  • B means a set of beam IDs included in the path, and the number and the order of the beam IDs are the same as the number and the order of the beam IDs experienced by a candidate pair.
  • T means a reference time experienced by a terminal that moves along a corresponding path, and as described above with reference to the Equation 2, it may be a ratio of a time for which the terminal stays in a specific beam ID area to an entire experience time.
  • the base station can determine similarity through comparison of another beam history possessed by the base station itself with the derived path P n . That is, operation 720 can be repeatedly performed with respect to the entire beam history candidates possessed by the base station. Through such a process, resultant values moving along a specific route are accumulated and corrected, and thus the derived path can be strengthened, and the accuracy and reliability of the path can be gradually improved.
  • Equation 4 is similar to the Equation 1, but it is different from the Equation 1 on the point that two initial candidate pairs are not compared with each other, but the order of the already derived paths P n is compared with the order of beam IDs of a beam history of a new terminal.
  • Equation 4 it is determined through comparison whether the ratios of staying times by beam IDs of the corresponding terminal to the staying times of the paths P n are similar to each other, and the comparison can be performed in accordance with Equation 5 below.
  • Equation 5 it can be determined that the terminal having reported the corresponding beam profile passes through the path P n , and the path can be strengthened in accordance with Equation 6 below.
  • the base station can update P n in accordance with the following Equation 6.
  • the base station determines whether the corresponding terminal moves on the already derived path by comparing beam-related information reported by a new terminal with the already derived path at operations 740 and 750.
  • a process in which the base station determines that the specific terminal moves on the corresponding path will be described in detail with reference to FIG. 8, and separately from such a determination process, the base station can continuously update a database of the paths using the beam-related information of the specific terminal.
  • FIG. 8 is a flowchart illustrating a terminal mobility support process (according to an embodiment of the disclosure.
  • the base station can optimize the handover procedure by supporting mobility of the terminal that is determined to move on a path.
  • the path derived in accordance with the process as described above with reference to FIGS. 5, 6, and 7 is performed using a beam history of the terminal that has moved to a coverage area of another cell by successfully performing the handover. That is, the derived path reflects the result that a specific terminal has succeeded in connecting from the base station to a neighboring base station, and if the specific terminal that is determined to move on the path performs the handover in accordance with the result that the previous terminals have succeeded, there is a very high probability that the specific terminal will successfully connect to the neighboring base station.
  • the base station first identifies whether beam-related information reported by a certain terminal corresponds to at least a part of a derived path in order to determine whether a specific terminal moves along the path. This process can be performed in accordance with Equation 7 below.
  • j may mean the number of beam IDs reported by a terminal until a comparison time, and it may have a value that is smaller than the total number i of beam ID sets included in a path. That is, a base station determines, through comparison, similarity among a collected beam ID reported by a specific terminal in the coverage area, a staying time candidate pair and a beam ID of a path, and a part of a staying time candidate pair. If it is determined that the beam ID values and orders are the same in accordance with the Equation 7, staying time ratios are compared with each other in accordance with Equation 8 below.
  • the Equation 8 corresponds to a process of determining whether a ratio of a staying time of a terminal that satisfies the Equation 7 until the j-th beam ID is similar to a ratio of a staying time of a path. If the Equation 8 is satisfied, the base station can determine that the corresponding terminal is passing through a part of a path P n , and the corresponding terminal can be estimated to pass through areas ⁇ ⁇ corresponding to the remaining beam IDs on the path P n . Further, the base station can estimate that the corresponding terminal will stay in the areas corresponding to the respective beam IDs that the corresponding terminal will pass through as long as a time expressed in Equation 9 below.
  • the base station can predict the beam ID that the corresponding terminal will pass through, the base station can determine what serving beam is to be allocated to the terminal in order to communicate with the terminal as the terminal moves forward at operation 810. Then, the base station can calculate how much time the terminal will stay in areas corresponding to the respective beam IDs, and thus it can predict the time when it allocates the corresponding serving beam to the terminal through . Accordingly, the base station can change the serving beam even if a separate feedback or beam-related information on the beam measurement result is not reported from the terminal at a predicted time.
  • the base station already knows what target cell the terminal will perform a handover to on a path and information on a serving beam to be first allocated in the target cell. That is, because the path is derived from beam histories of the terminals having succeeded in handover, the base station can determine the time to transmit a handover command message to the terminal at operation 820, and can also determine the ID of the target cell that is a target of handover and the first serving beam to be allocated in the target cell at operation 830.
  • the base station transmits, to the terminal, a handover message including information on the target cell ID and the beam ID of the target cell at operation 840, and the time when the handover command message is transmitted is the time derived at operation 820, and may be a proper time when the terminal should prepare the handover before moving away from the coverage area of the base station.
  • the base station refers to histories of other terminals having succeeded in handover, and if a specific terminal moves on the same path as the path of the corresponding terminal, the base station can prevent unnecessary overhead and delay due to handover failure by optimizing the handover time and procedure of the specific terminal.
  • the handover preparation process is quite time-consuming because of the terminal mobility, and if the terminal performs the handover in a state where the terminal already knows a target cell and what serving beam is to be used, stability of the handover can be greatly secured.
  • the time required for handover preparation is shortened, and thus greater advantage can be obtained by the operations according to the embodiments.
  • FIG. 9 is a diagram illustrating the structure of a terminal according to an embodiment of the disclosure.
  • a terminal 900 may include a transceiver 910, a terminal controller 920, and a storage 930.
  • the terminal controller 920 may be defined as a circuit or application-specific integrated circuit or at least one processor.
  • the transceiver 910 transmits and receives signals with another network entity.
  • the transceiver 910 may receive, for example, a synchronization signal from a base station, and may be implemented in the form of a radio frequency (RF) unit including a modem.
  • RF radio frequency
  • the terminal controller 920 may control the overall operation of the terminal according to an embodiment proposed in the disclosure.
  • the terminal controller 920 may control the transceiver 910 and the storage 930 to perform operations according to the embodiment as described above with reference to the drawings.
  • the terminal controller 920 may measure the beam-related information from the beam received from the base station to report the measurement result to the base station, and may perform communication with the base station through allocation of the serving beam from the base station. Further, the terminal controller 920 may perform a handover to an adjacent target cell using information included in the handover message received from the base station.
  • the storage 930 may store at least one of information transmitted and received through the transceiver 910 or information generated through the terminal controller 920.
  • FIG. 10 is a diagram illustrating the structure of a base station according to an embodiment of the disclosure.
  • a base station 1000 may include a transceiver 1010, a base station controller 1020, and a storage 1030.
  • the base station controller 1020 may be defined as a circuit or application-specific integrated circuit or at least one processor.
  • the transceiver 1010 transmits and receives signals with another network entity.
  • the transceiver 1010 may transmit, for example, a synchronization signal to a terminal, and may be implemented in the form of an RF unit including a modem.
  • the base station controller 1020 may control the overall operation of the base station according to an embodiment proposed in the disclosure.
  • the base station controller 1020 may control the transceiver 1010 and the storage 1030 to perform operations according to the embodiment as described above with reference to the drawings.
  • the base station controller 1020 may store and manage a beam history of the terminal from the beam measurement result received from the terminal, detect a path in the coverage area based on the stored beam history, and determine whether terminals move on the path. Further, the base station controller 1020 may select the optimum beam in accordance with the mobility of the terminal to allocate the selected optimum beam to the terminal as the serving beam, and transmit, to the terminal, a handover related message including information on the target cell and the specific beam so that the terminal performs the handover.
  • the storage 1030 may store at least one of information transmitted and received through the transceiver 1010 or information generated through the base station controller 1020.
  • the embodiment as described above it is possible to reduce the signaling overhead and delay that may occur as the terminal moves in the beamforming-applied communication system.
  • the handover procedure of the terminal moving at high speed can be optimized, and the user sensory performance can also be improved.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne une station de base et un procédé exécuté par la station de base pour prendre en charge la mobilité d'un terminal dans un système de communications sans fil basé sur une formation de faisceau. Le procédé consiste à : générer des informations relatives au faisceau pour une pluralité de terminaux à partir de résultats de mesurages de faisceau reçus respectivement de la pluralité de terminaux ; détecter un trajet dans une zone de couverture de la station de base d'après les informations relatives au faisceau ; et transmettre un message au terminal déterminé pour se déplacer le long du trajet en vue de prendre en charge la mobilité sur la base des informations relatives au faisceau.
EP19789136.9A 2018-04-17 2019-03-27 Procédé et appareil pour prendre en charge la mobilité d'un terminal dans un système de communications sans fil Pending EP3701745A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020180044277A KR102460324B1 (ko) 2018-04-17 2018-04-17 무선 통신 시스템에서 단말의 이동성을 지원하는 방법 및 장치
PCT/KR2019/003562 WO2019203468A1 (fr) 2018-04-17 2019-03-27 Procédé et appareil pour prendre en charge la mobilité d'un terminal dans un système de communications sans fil

Publications (2)

Publication Number Publication Date
EP3701745A1 true EP3701745A1 (fr) 2020-09-02
EP3701745A4 EP3701745A4 (fr) 2021-03-31

Family

ID=68162348

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19789136.9A Pending EP3701745A4 (fr) 2018-04-17 2019-03-27 Procédé et appareil pour prendre en charge la mobilité d'un terminal dans un système de communications sans fil

Country Status (5)

Country Link
US (1) US10880800B2 (fr)
EP (1) EP3701745A4 (fr)
KR (1) KR102460324B1 (fr)
CN (1) CN112042228A (fr)
WO (1) WO2019203468A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020065818A1 (fr) * 2018-09-27 2020-04-02 三菱電機株式会社 Dispositif de transmission, dispositif de réception et système de communication sans fil
US10855345B2 (en) * 2018-09-28 2020-12-01 At&T Intellectual Property I, L.P. Generalized beam management framework
WO2021022479A1 (fr) * 2019-08-06 2021-02-11 华为技术有限公司 Procédé et appareil de formation de faisceau, dispositif de réseau d'accès radio et support de stockage lisible
US20230020735A1 (en) * 2019-12-09 2023-01-19 Ntt Docomo, Inc. Terminal and radio communication method
KR102165835B1 (ko) * 2019-12-27 2020-10-14 국방과학연구소 밀리미터파 통신 파티클 필터 기반 빔 추적 방법 및 그 방법을 구현하는 기지국
US11765708B2 (en) 2020-01-31 2023-09-19 Nokia Technologies Oy Geographic information system (GIS)-new radio (NR) beamforming for millimeter wave
CN115812329A (zh) * 2020-07-08 2023-03-17 诺基亚技术有限公司 校准波束取向误差以改进定位
US11425627B2 (en) * 2020-08-10 2022-08-23 Qualcomm Incorporated Route-based beam provisioning
WO2022184233A1 (fr) * 2021-03-02 2022-09-09 Telefonaktiebolaget Lm Ericsson (Publ) Filtre de faisceau adaptatif pour systèmes de communication mobile
WO2023206062A1 (fr) * 2022-04-26 2023-11-02 Huawei Technologies Co.,Ltd. Procédé et appareil de gestion de faisceaux
CN117255328A (zh) * 2022-06-10 2023-12-19 索尼集团公司 用于无线通信的电子设备和方法、计算机可读存储介质

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120091433A (ko) * 2007-10-31 2012-08-17 미쓰비시덴키 가부시키가이샤 이동 통신 시스템, 기지국, 이동국, 및 기지국 설치방법
WO2011091191A1 (fr) * 2010-01-21 2011-07-28 Telcordia Technologies, Inc. Système et procédé de gestion d'équilibrage de charge et de transfert sur la base de plan de vol et de l'occupation des canaux
US8804671B2 (en) * 2010-07-15 2014-08-12 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for determining UE mobility status
KR101878211B1 (ko) * 2011-09-19 2018-07-16 삼성전자주식회사 무선 통신 시스템에서 다중 빔포밍 송수신기를 운용하기 위한 장치 및 방법
KR20130061936A (ko) * 2011-12-02 2013-06-12 삼성전자주식회사 무선 통신 시스템에서 안전한 통신을 수행하기 위한 장치 및 방법
TWI611708B (zh) * 2012-08-28 2018-01-11 Idac控股公司 從主波束的通信鏈路交遞的方法及裝置
KR101957783B1 (ko) * 2012-09-12 2019-03-13 삼성전자주식회사 무선 통신 시스템에서 핸드오버를 위한 장치 및 방법
US9578583B2 (en) 2013-08-12 2017-02-21 Telefonaktiebolaget Lm Ericsson (Publ) Handover improvement for high speed user equipment in LTE
US9609569B2 (en) * 2013-09-19 2017-03-28 Cisco Technology, Inc. High-speed mobile broadband access by slewing between vehicular narrowbeam transceiver and fixed transceivers along prescribed path
GB2522603A (en) * 2013-10-24 2015-08-05 Vodafone Ip Licensing Ltd High speed communication for vehicles
WO2016032359A1 (fr) 2014-08-28 2016-03-03 Intel Corporation Appareil, système et procédé de communication avec un véhicule le long d'une voie de transport
KR102206789B1 (ko) * 2014-09-15 2021-01-26 삼성전자 주식회사 무선 통신 시스템에서 채널 접속 방법 및 장치
US9578644B2 (en) * 2014-09-26 2017-02-21 Mediatek Inc. Beam misalignment detection for wireless communication system with beamforming
US9668189B2 (en) * 2014-11-14 2017-05-30 Industrial Technology Research Institute Handover management method and base station using the same
EP3251406B1 (fr) 2015-01-30 2020-01-15 Telefonaktiebolaget LM Ericsson (publ) Transfert dans un scenario à grande vitesse
WO2016200302A1 (fr) * 2015-06-10 2016-12-15 Telefonaktiebolaget Lm Ericsson (Publ) Procédé et appareil de détermination d'un faisceau pour diriger un signal à envoyer à un équipement d'utilisateur
US10455468B2 (en) 2015-08-14 2019-10-22 Qualcomm Incorporated Mobility enhancements for high speed scenarios
US10028180B2 (en) * 2016-04-01 2018-07-17 Telefonaktiebolaget Lm Ericsson (Publ) Network device, terminal device and methods for facilitating handover of terminal device
US20180049274A1 (en) * 2016-08-12 2018-02-15 Samsung Electronics Co., Ltd. V2x communication method and terminal
CN107889130B (zh) * 2016-09-29 2023-04-18 华为技术有限公司 无线资源选择方法及装置
JP6793420B2 (ja) * 2017-03-31 2020-12-02 深▲せん▼前海達闥云端智能科技有限公司Ｃｌｏｕｄｍｉｎｄｓ （Ｓｈｅｎｚｈｅｎ） Ｒｏｂｏｔｉｃｓ Ｓｙｓｔｅｍｓ Ｃｏ．，Ｌｔｄ． セル切り替え方法および装置
US10749920B2 (en) * 2017-06-09 2020-08-18 FG Innovation Company Limited Monitoring system and wireless communication system equipped therewith
US10263690B2 (en) * 2017-08-01 2019-04-16 Viasat, Inc. Handover based on predicted network conditions

Also Published As

Publication number Publication date
WO2019203468A1 (fr) 2019-10-24
KR102460324B1 (ko) 2022-10-28
CN112042228A (zh) 2020-12-04
US10880800B2 (en) 2020-12-29
US20190320364A1 (en) 2019-10-17
KR20190120902A (ko) 2019-10-25
EP3701745A4 (fr) 2021-03-31

Similar Documents

Publication Publication Date Title
WO2019203468A1 (fr) Procédé et appareil pour prendre en charge la mobilité d'un terminal dans un système de communications sans fil
WO2018203716A1 (fr) Procédé pour opération d'événement de rapport de mesure et signalisation de réseau dans un transfert autonome d'ue
US10542469B2 (en) Apparatus and method for supporting handover with multi-connectivity in wireless communication system
US8548476B2 (en) Method of managing X2 interface, handover method, interference coordination method and apparatus
EP3583803A2 (fr) Procédé et équipement utilisateur pour effectuer un alignement de faisceau initial pendant une procédure d'accès aléatoire (rach)
WO2016056817A1 (fr) Appareil et procédé de fourniture de multiples connexions en utilisant différentes technologies d'accès radio dans un système de communication sans fil
KR101355012B1 (ko) 조정된 멀티포인트（ｃｏｍｐ） 송신 네트워크에서의 핸드오버 절차
WO2015156575A1 (fr) Procédé et appareil pour suivre un faisceau de liaison montante dans un système cellulaire basé sur une formation de faisceau
WO2020167038A1 (fr) Procédé et dispositif de gestion de faisceau dans une communication de liaison latérale
EP3884705A1 (fr) Procédé et appareil permettant de traiter un transfert intercellulaire dans un système de communication sans fil
WO2013147499A1 (fr) Procédé et dispositif pour la préservation de données de mobilité lors d'une transition d'état d'un terminal, et pour un nouvel accès réussi dans un réseau cellulaire hétérogène dans un système de communication mobile
WO2013042934A2 (fr) Procédé et système pour mettre en œuvre une station relais mobile
WO2016208955A1 (fr) Procédé et appareil destinés à un fonctionnement dans un environnement de coexistence de réseaux cellulaire, non cellulaire, macro et micro
EP2950586A1 (fr) Procédé et appareil de commande de la mobilité pour une cellule ayant une zone de desserte de petites cellules dans un système de communication mobile
WO2015174804A1 (fr) Procédé et dispositif pour continuité de service d'un terminal
WO2020167087A1 (fr) Procédé et dispositif pour transmettre des données dans un système de communication sans fil
WO2018124675A1 (fr) Équipement utilisateur (ue) et procédé pour effectuer un accès aléatoire pour un transfert intercellulaire de mode connecté basé sur la formation de faisceau
CN106792887B (zh) 一种面向5g平台的节点发现方法及系统
WO2016003113A1 (fr) Procédé et système pour commander une continuité de service dans un système de communication sans fil
CN103002526A (zh) 小区切换的控制和测量方法、装置及系统
WO2021006473A1 (fr) Procédé d'attribution de ressources dans une communication de liaison latérale
EP4033851B1 (fr) Procédé pour l'identification unique d'utilisateurs individuels dans une commande intelligente d'un réseau d'accès radio (ran)
JP2019519175A (ja) Ｌｔｅと５ｇのタイト・インターワーキングの場合の通信処理方法及び装置
WO2019194578A1 (fr) Procédé et dispositif d'authentification d'ue
WO2020159225A1 (fr) Procédé et dispositif de communication de diffusion de groupe de liaison latérale

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20200528

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIC1 Information provided on ipc code assigned before grant

Ipc: H04B 7/06 20060101ALI20201027BHEP

Ipc: H04W 72/04 20090101ALI20201027BHEP

Ipc: H04W 36/32 20090101AFI20201027BHEP

Ipc: H04W 16/28 20090101ALI20201027BHEP

Ipc: H04B 7/08 20060101ALI20201027BHEP

Ipc: H04W 36/30 20090101ALI20201027BHEP

A4 Supplementary search report drawn up and despatched

Effective date: 20210303

RIC1 Information provided on ipc code assigned before grant

Ipc: H04B 7/06 20060101ALI20210225BHEP

Ipc: H04W 16/28 20090101ALI20210225BHEP

Ipc: H04W 36/32 20090101AFI20210225BHEP

Ipc: H04B 7/08 20060101ALI20210225BHEP

Ipc: H04W 72/04 20090101ALI20210225BHEP

Ipc: H04W 36/30 20090101ALI20210225BHEP

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20230119